Air pump



FIG. 1 is a perspective view of an air pump showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another perspective view thereof.

The shaded surfaces and the solid lines represent the claimed portions of the design.

The broken lines depict portions of the air pump in which the design is embodied that are not considered part of the claimed design. 

CLAIM The ornamental design for an air pump, as shown and described. 